Measurement Accuracy of the Body Weight with Smart Insoles

• Main Authors: Adin Ming Tan, Yehuda Weizman, Franz Konstantin Fuss
• Format: Article
• Language: English
• Published: MDPI AG 2018-02-01
• Series: Proceedings
• Subjects: Pedar; dynamics; bodyweight; accuracy; baseline correction
• Online Access: http://www.mdpi.com/2504-3900/2/6/274

A participant wearing the Pedar-X performed 6 activities on level ground: Slow, medium and fast walk, medium and fast run, and limping. Static BW was measured prior each activity. The dynamic and static BWs were calculated from the mean of the sum of forces of both feet over time and compared to the force measured from the force-plate. As the base pressure during the swing phase was not zero, it was treated in 3 ways: including the base pressure; subtracting the mean base pressure from the swing phase; subtraction of the base pressure from the entire signal. The calculated BWs were normalised to the actual BW of the participant. From the results, the BWs calculated had 10% error when static and 6% error when walking. To zero or subtract the baseline pressures improved the BW measurement by 1.75% and 4% respectively. Running data could not be analysed at a sampling rate of 50 Hz.